Orifice diaphragm for head gates



April 0, 1935. w. R. BURKHARDT 1,999,921

ORIFICE DIAPHRAGM FOR HEAD GATES .Filed Aug. 8, 1934 ATTORNEY Patented Apr. 30, 1935 The invention relates to irrigation head gates and more especially to orifice diaphragms for the head gates.

The primary object of the invention is the provision of a diaphragm of this character,

wherein the same is constructedto become seated at the inlet end of a pipe used in irrigation and this diaphragm has provided therein a circular orifice which eliminates clogging by weeds, moss and other matter contained in' irrigation water and thus assuring successful irrigation.

Another object of the'invention is the provision of ajdiaphragm of this character, wherein able for fitting with irrigation piping, and inex-- pensive to manufacture and install.

With these and other objects in view, the invention consists in the features of construction, combination and arrangement of parts. as will be hereinafter more fully described in detail, illustrated in the accompanying drawing, which discloses the preferred embodiment of the invention, and pointed out in the claim hereunto appended.

In the accompanying drawing:

Figure 1 is an elevation of a head gate as applied to irrigation piping, showing the diaphragm constructed in accordance with the invention in place. 7

Figure 2 is a sectional view on the line 2-2 of Figure 1. 1

Figure 3'is a rear elevation showing a slight.

Arcs: f

to the irrigation system. Upon this pipe section A, at the inlet end, is arranged a head gate comprising a collar-like pipe section fitting I!) which is ladapted to be telescoped over the end of the pipe'section A andfrom which rises the inverted substantially U-shaped frame H, the side pieces of which constitute guide flanges l2 for the circular-shaped gate l3 proper. This gate i3, at opposite sides projected laterally from the outer periphery, has formed therewith the runners I4 slidably engaging the flanges i2 of the frame ll.

Medially of the head end I 5 of the frame I I" is fitted an adjusting stem l6 which, at the lower portion thereof, fits between pivot ears I! on the gate I3 proper and. these ears carry a pivot bolt l8 connecting the lower end of the stem [6 to said gate proper. The stem [3 at its upper portion is threaded, as at IQ, for the companion fitting in the hub 20 of a turning wheel 2 I which has its bearing upon a bearing plate 22' on the UNITED f A 'j 11,999,921

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, adapted to constitute the inlet for water admitted head end l5 of the frame II, the wheel 2! being This body 23 at its peripheral portion confronts the end of the pipe section A and is of a diameter alike to theexternal diameter of said pipe section to become seated against the said end thereof. On the inner face of the body 23 is an annular ring 26 having the inturned flange 21 interfitted about the same and this flange is made fast to the inner face of the body 23 throughout the extent thereof, the ring 25 being inset to the outer periphery of the body 23 and adapted to fit within the pipe section A, so that the latter will be telescoped over this ring, while the outer face of the body 23 lies flush with the outer surface of the fitting l0 and. the gate l3 proper is adapted to move over the body 23 for controlling the respective orifices 24 and 25 therein, these being circular in shape,'and thus the liability of weeds, moss and all kinds of dbris clinging within the orifices is entirely eliminated and the clogging of the pipe section and the orifices is avoided. Disposed transversely between the'orifices 24 and 25 upon the inner face of the body 23 is an angle reinforcing piece 28 which meets at its opposite ends the flange 21 of the ring 26 and thus this body 23 of the diaphragm is materially .the orifices in the diaphragm may be varied acreinforced to withstand the pressure of the water cording to the capacity required for irrigation purand severe usage of such diaphragm. poses, while the head gate regulates the flow of In Figures -3 and 4 of the drawing there is the irrigation water for entrance into the pipe shown a slight modification of diaphragm wherein the orifice 29 in the body 30 of such diaphragm has its peripheral edge inwardly rolled, as at 3|, and thus materially strengthening such edge without-presentation of lodging placesafor. floating weedsjmoss or other d brisi-as'l'containediin What is claimed is:

A diaphragm of the character described comprising a disk like body having a circular orifice thereimat oneside of itsncenterna, ringlike memb'ermf iiessidiameter than'ethe body and fitted the irrigation water to choke the flow thereof to' one side thereof to provide an annular flange through the orifice in the diaphragm. a e .aNVith the edge of the disk concentric to said flange The manner of use of the diaphragm and the" and an angle reinforcing piece within the ring construction thereof shoul'd be leaiflifliiiidd'fitod alikeihiember meeting at opposite ends the flange from the foregoing description and-thedllustratandrdisposedtransversely of the disk for con- 15 tion in the drawing, so a more; expended'e'iq'ilana. tact therewith. tion has been omitted. Si -{Li a} his ,6 Sly l} 5 I ulf It is, of course, understood that the sizes ofsection of the irrigation system. 5 

